IStat Pro: which fan speeds/temps do you have (iMac)

Hi there,
yes, I know, this kind of question has passed before...
In order to eliminate everything which could cause my iMac to shut down itself after a while running, I really would be pleased to get a clear answer on this one. It seems more and more that it shuts itself down when it's on "regime" temp., if you know what I mean.
Anyway is there anybody out there who can say which speeds are normal (compared to intensive/not intensive use of your mac)? @ which temps?
On my iMac they are ALWAYS the same (even @ cold start), even if you see the temps going up.
I think that's weird: you should expect them to go up once in a while, no? Especially when it's getting "on temperature".
CPU fan: 1198 to 1202 rpm
Hard Drive: 1598 to 1602 rpm
Optical drive: 798 to 900 rpm
What speeds do your iMac fans run?
Any additional info or questions would be more then welcome.
Thanks in advance!
Grtz,
Peter.

HI,
Not sure why your iMac is shutting down... if you haven't tried... reset the SMC and see if that helps.
http://support.apple.com/kb/HT3964?viewlocale=en_US
Might want to run the Apple Hardware Test also.
http://support.apple.com/kb/HT1883
And try the advice given by "den.thed" here.
http://discussions.apple.com/thread.jspa?threadID=914175
Carolyn

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I didn't want to hijack wallenfox's post, but he was inquiring about an unusually high temperature on the power supply - 95 C. Then rkaufmann87 asked how to get the power supply to display its temp in iStat Pro. George Peters said, "iStat Pro can only displays 8 temperatures at a time and by default the Power Supply temp is last on the list so you have to go into the settings under Display and Temps. You can check the ones you want to show up." I am wondering which 8 temperatures are the most critical and should be selected for display. I am not a gamer and never run such as World of Warcraft, etc. if this matters in the selection of the 8.

It really comes down to preference. If you want my opinion the most important temps to watch are the HD, Power Supply, and GPU Diode. My iStat list goes like this:
HD
CPU A
Ambient
GPU
GPU Diode
HD Bay 1
Optical Drive
Power Supply
Now depending on your situation you might want to change the order of things. For instance if you are using a wireless connection you would want the Wireless Module in the list. Also if you like to monitor your temps have a look at Temperature Monitor. Its nice because it displays all the temps in your Menu bar and allows you to set up temperature alarms.
Examples:
http://ftp.georgetek.com/George/Temperatures/iMac2.33/TempsNormal.png
http://ftp.georgetek.com/George/Temperatures/ALU2008_iMac_2.8/TempsNorm.png
http://www.macupdate.com/info.php/id/12381
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A1212 Macbook Pro Cooling Fan Speed / SMC / Service Battery

Background:
I've owned my A1212 Macbook Pro Core 2 Duo since launch (Thanksgiving 2006 I believe). For some time now the temperature has been quite warm - more recently my right cooling fan has intermittently sounded like a jet engine and failed to speed beyond 1,500-2,000 rpm intermittently.
1. I ordered the correct cooling fan for A1212 right and replaced.
2. When I rebooted Macbook Pro here is what I see for temps in hardware monitor
AMBIENT TEMP 31C/88F
CPU A 44C 111F
CPU CORE 1:36C/97F
CPU CORE 2:39C/100F
"SMART DISK" — [DOES THIS MEAN THERE IS A SENSOR THAT IS NOT REGISTERING]
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The new cooling fan is majorly cooling the mac much better than prior fan.
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b) reboot
c) remove smcfancontrol
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4) I notice ( this was also showing up before install of new fan) in my battery icon it indicates "Service Battery" - while I do have a 4 yr old computer there was a recall on batteries so this battery is maybe 3 yrs old and I usually use computer plugged in.
I do not have my snow leopard boot dvd readily available to run hardware test on sensors, however techtool pro does not report any issues. I have not found any terminal commands to force the fan speed down nor any indication I have any apps that are accelerating it.
It appears that my fan speeds are accelerating shortly after power up - before OS X is even loaded completely - and never slow to normal speed except when mac is asleep.
IS IT POSSIBLE TO CONNECT THE FAN INVERTED (THE TWO PINS) MESSING UP ABILITY TO CONTROL FAN SPEED?
IS IT POSSIBLE THAT I INADVERTENTLY BROKE SOME SENSOR "SMART"?
I am thinking more and more that this is hardware related like a sensor. Any assistance would be greatly appreciated, while I don't have a Jet engine I have a very noisy mac

Hi N,
SMART reports on a number of checks on the HD. I don't believe that's any part of the current issue.
I agree with you that my first inclination is toward a sensor issue; by default, if the sensor's are not reporting properly, the fans run full speed/6000RMP.

IStat Pro, SMC fan control and tempuratures

I've been watching the recent temp. problem threads with great interest.
My Imac has had no operational flaws *knock wood* but I'm a bit concerned with the temps which iStat Pro is reporting. For instance;
CPU A 103 F.
CPU diode 133 F.
Ambient 79 F.
Memory Control 112 F.
HD Bay 1 103 F.
Optical Drive 94 F.
WDC WD1600 etc etc, (the hard drive I presume), 99 F.
Most of these temps seem pretty darned high to me. OR, am I mistaken and they are not out of line?
Running SMC fan control at about 1/2 way up on all 3 sliders brings these temps down considerably, but I hate to "over rev" the fans and hasten their demise if I don't have to.
I'll appreciate your thoughts.
Thanks; Jon

Your temps seem low to me but i have no data on what is low or too high
20" iMac 2.4 GHz-2 GB Intel:
CPU....................122F
CPU....................122F
Ambient.............. 79F
Mem..Con........123.8F
HD Bay...............122F
Opt..Dr...............109F
Wireless .............122F
Graph Proc diode.159.8F
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1200
1200

Questions about macbook pro's fan speed

i'm using a macbook pro early 2008
and i use istatpro to monitor cpu gpu temp
1. do the fans work with a min rpm around 2000 all the time?
2. when i open quite a few apps, mbp get hot, and the gpu temp rises up to 80c degree also cpu temp rises to 60or70c degree. but the fan rpm is still around 2800.
some guys using macbook/pro confirm that with temp around 80c, their fan has a rpm around 3000or4000.
does someone else here have this situation above.
is it normal?
thanks a lot

Welcome!
1) Yes, the default fan speed is 2000 rpm. At that speed they are nearly silent. The speed will increase with temperature. Max revs possible are 6000 rpm.
2) Notebook computers get hot, regardless of make. The temps you see are reasonable for graphic-intensive applications. The MBP will automatically shut down if the temps get too high; I believe the cutoff point is just over 100°C.
There are third-party programs that allow you to customize fan settings but they must be used with care. It's possible to overwork the fans by manually setting their speeds too high.
The best approach is to insure that the MBP gets to use all its built-in cooling capacity. Using the computer on a pillow or blanket is bad; the case bottom dissipates heat but only if air can get under it. Use a lapboard if you must use the computer in your lap.
Exhaust air emits from the hinge area in the back of the case. make sure nothing blocks the case there or you'll get overheating.

Istat pro exhuast fan reading 0rpm

I have a 13 inch MacBook that I got in 2011, not an Air or a Pro. But by fan was making a strange noise (starting just two days ago) it was almost like a purring, but I was sure that it was my fan. About three hours ago I opened it up and it wasn't making the noise anymore so I was concerned as to whether or not my fan was working at all. So I downloaded Istat pro, and in the fans category, it has one spot for the exhaust which reads 0rpm. I started freaking out, thinking that my fan has failed, but for the past few hours now the temp of the CPU and pretty much everything else has stayed between 30 and 55 degrees Celcius? I kind of freaking out here, because I don't know what this means.
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Run the Apple hardware test to see if it shows any sensor or hardware issues. When prompted, run the extended test, which can take over an hour to run.

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My 17" MBP fan is almost constantly running at the max speed (6000 rpm). The temp is at 75 C as well. Since i'm in school the loud fan speed it very annoying and I would like to know if I have a problem with either my temp sensors, logic board or fans.
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When I'm in my home office, I often use my MacBook Pro Retina in Clamshell Mode (in a BookArc) with external displays.
Originally, I used 2 external displays (2x 1920x1800), and the fan speed and temperature remained stable at the lowest end of the spectrum (around 2200rpm and 60°C). However, recently I decided to use all the ports available and plug in an extra monitor (1680x1050) for that extra screen real estate. I can tell you that having three external monitors really makes a difference to my productivity. However, just by adding this extra display, the fan speed boosts up to a minimum of 4500rpm and often goes up to around 6000rpm. The temperature is also high (I guess the fan speed is a symptom of this).
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I've managed to get the fan speed down to a reasonable, less audible level by using that old VRAM terminal command to enable me to keep the internal display disabled whilst the lid is open. I've had to shift quite a lot round on my desk to make this happen, but I guess it was the only way. It now runs 3 screens under similar loads at approximately 3500prm.
Taking your advice into consideration, I raised the rear feet and this enabled further decrease in fan speed. I guess one of those laptop stands will augment this effect, and I will look into them.
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Like a lot of other people, I'm having problems with ridiculous fan noise. I've read through the forum and tried the following (with no success):
1) Reset SMU (x2)
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The processor is set to automatic. The problem occurs whether or not I have any peripherals plugged in. I get the noise/rpms when all I have running is Safari and XRG.
On certain websites, the CPU fan will climb to 5600, CPU temp to 79C, with CPU usage at 80-90%.
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Just an FYI. During my iMacs motherboard replacements (3) I was never asked for a case number once. I spent hours on the phone with Applecare when in reality I already new I had a hardware problem and if I would have just taken it in it would have been fixed quicker. The third time I took my iMac G5 in for service the local tech told me to call up Applecare (3rd time then call) and ask for a replacement stating that if they need to call me he would explain that I had a lemon. In everyone of the three bad motherboards the fans spun out of control so I have more experience than I would prefer on this subject. They did step up and as you can see in my profile I have a new Intel iMac courtesy of Apple.
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After restarting the mac pro works fine again! this happened 2 times now...
Already called with apple they said that i should try and work with it and see if the problem comes back again.
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IStat Pro: which fan speeds/temps do you have (iMac)

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